Craftsman 81079 Owner'S Manual Download

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Owner's Manual

True RMS Multimeter
with IR Thermometer

Model No.
81079

© Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

www.craftsman.com 062006

•

Safety

•

Operation

•

Maintenance

•

Español

CAUTION

: Read, understand and

follow Safety Rules and Operating
Instructions in this manual before
using this product.

Summary of Contents for 81079

Page 1: ...meter Model No 81079 Sears Roebuck and Co Hoffman Estates IL 60179 U S A www craftsman com 062006 Safety Operation Maintenance Español CAUTION Read understand and follow Safety Rules and Operating Instructions in this manual before using this product ...

Page 2: ...rements 14 Resistance Measurements 15 Continuity Check 16 Diode Test 16 Contact Temperature Measurements 17 Non Contact Temperature Measurements 18 Capacitance Measurements 19 Frequency Measurements 20 Duty Cycle Measurements 20 Autorange Manual Range Selection 21 Relative Mode 21 Display Backlight 21 Data Hold 22 Auto Power Off 22 Low Battery indication 22 Wrong Connection Indication 22 Maintenan...

Page 3: ...his warranty gives you specific legal rights and you may also have other rights which vary from state to state Sears Roebuck and Co Dept 817WA Hoffman Estates IL 60179 For Customer Assistance Call 9am 5pm ET Monday through Friday 1 888 326 1006 WARNING USE EXTREME CAUTION IN THE USE OF THIS DEVICE Improper use of this device can result in injury or death Follow all safeguards suggested in this man...

Page 4: ...ce Duty Cycle Diode Test Continuity 250Vrms for 15sec max Temperature 60V DC 24V AC 2 USE EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 600V above earth ground 4 DO NOT measure current of circuits whose voltage is greater than 500V above earth ground 5 NEVER connect the meter leads across a voltage source while the function sw...

Page 5: ... This symbol advises the user that the terminal s so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds in this case 600 VAC or VDC This symbol adjacent to one or more terminals identifies them as being associated with ranges that may in normal use be subjected to particularly hazardous voltages For maximum safety the meter and its test leads ...

Page 6: ...ote Tilt stand and battery compartment are on rear of unit SYMBOLS AND ANNUNCIATORS Continuity Diode test Laser pointer Battery status Test lead connection error n nano 10 9 capacitance micro 10 6 amps cap m milli 10 3 volts amps A Amps k kilo 10 3 ohms F Farads capacitance M mega 10 6 ohms Ohms Hz Hertz frequency V Volts Percent duty ratio REL Relative AC Alternating current AUTO Autoranging DC D...

Page 7: ... 5 reading 6 digits 2 5 reading 8 digits AC Voltage 600V 1V 1 8 reading 6 digits 3 reading 8 digits 400µA 0 1µA 4000µA 1µA 40mA 0 01mA 400mA 0 1mA 1 5 reading 3 digits 4A 0 001A DC Current 20A 0 01A 2 5 reading 5 digits 50 to 400Hz 400Hz to 1KHz 400µA 0 1µA 4000µA 1µA 40mA 0 01mA 400mA 0 1mA 1 8 reading 8 digits 3 0 reading 7 digits 4A 0 001A AC Current 20A 0 01A 3 0 reading 8 digits 3 5 reading 1...

Page 8: ...Hz 5 000kHz 0 001kHz 50 00kHz 0 01kHz 500 0kHz 0 1kHz 1 2 reading 2 digits 5 000MHz 0 001MHz 10 00MHz 0 01MHz 1 5 reading 4 digits Frequency Sensitivity 0 8V rms min 100kHz 5Vrms min 100kHz 0 1 to 99 9 0 1 1 2 reading 2 digits Duty Cycle Pulse width 100 s 100ms Frequency 5Hz to 150kHz 4 to 1382 F 1 F Temp type K 20 to 750 C 1 C 3 0 reading 3 digits probe accuracy not included 4 to 518 F 1 F Temp I...

Page 9: ...cation for positive Minus sign for negative Measurement Rate 2 times per second nominal Low Battery Indication is displayed if battery voltage drops below operating voltage Battery one 9 volt NEDA 1604 battery Fuses mA A ranges 0 5A 250V fast blow A range 20A 250V ceramic fast blow Operating Temperature 32 o F to 122 o F 0 o C to 50 o C Storage Temperature 4 o F to 140 o F 20 o C to 60 o C Relativ...

Page 10: ...crews using a Phillips head screwdriver 3 Insert the battery into battery clips observing the correct polarity 4 Put the battery cover back in place and secure with the two screws WARNING To avoid electric shock do not operate the meter until the battery cover is in place and fastened securely NOTE If your meter does not work properly check the fuses and batteries to make sure that they are still ...

Page 11: ...m changing reading This is normal and is caused by the high input sensitivity The reading will stabilize and give a proper measurement when connected to a circuit DC VOLTAGE MEASUREMENTS CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the V position 2 Insert the black test...

Page 12: ...utlet before assuming no voltage is present CAUTION Do not measure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the V position 2 Press the SELECT button to indicate AC on the display 3 Insert the black test lead banana plug into the negative COM jack Insert red test lead banana plug into the ...

Page 13: ...ck 3 For current measurements up to 400mA DC set the function switch to the mA position and insert the red test lead banana plug into the A mA jack 4 For current measurements up to 20A DC set the function switch to the A range and insert the red test lead banana plug into the 20A jack 5 Remove power from the circuit under test then open up the circuit at the point where you wish to measure current...

Page 14: ... banana plug into the A mA jack 3 For current measurements up to 400mA AC set the function switch to the mA position and insert the red test lead banana plug into the A mA jack 4 For current measurements up to 20A AC set the function switch to the A range and insert the red test lead banana plug into the 20A jack 5 Press the SELECT button to indicate AC on the display 6 Remove power from the circu...

Page 15: ...e cords 1 Set the function switch to the position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive jack 3 Touch the test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading 4 Read the resistance in ...

Page 16: ...tance is less than approximately 150 the audible signal will sound If the circuit is open the display will indicate OL DIODE TEST 1 Set the function switch to the position 2 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive diode jack 3 Press the SELECT button to indicate on the display 4 Touch the test probes to the diode under t...

Page 17: ...rity 3 Touch the Temperature Probe head to the part whose temperature you wish to measure Keep the probe touching the part under test until the reading stabilizes about 30 seconds 4 Read the temperature in the display Note The temperature probe is fitted with a type K mini connector A mini connector to banana connector adaptor is supplied for connection to the input banana jacks ...

Page 18: ... the exact spot being measured 4 The area of the surface to be measured must be larger than the spot size as determined by the distance to spot size specification 5 Read the temperature in the display WARNING Do not directly view or direct the laser pointer at an eye Low power visible lasers do not normally present a hazard but may present some potential for hazard if viewed directly for extended ...

Page 19: ... capacitance measurements Remove the batteries and unplug the line cords 1 Set the function switch to the CAP position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive CAP jack 3 Touch the test leads to the capacitor to be tested 4 Read the capacitance value in the display ...

Page 20: ...test probe tips to the circuit under test 4 Read the frequency on the display DUTY CYCLE 1 Set the function switch to the FREQ position 2 Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack 3 Press the SELECT key momentarily to select in the display 4 Touch the test probe tips to the circuit under test 5 Read the duty cycle on th...

Page 21: ...The relative measurement feature allows you to make measurements relative to a stored reference value A reference voltage current etc can be stored and measurements made in comparison to that value The displayed value is the difference between the reference value and the measured value 1 Perform the measurement as described in the operating instructions 2 Press the REL button to store the reading ...

Page 22: ...OW BATTERY INDICATION The icon will appear in the lower left corner of the display when the battery voltage becomes low Replace the battery when this appears WRONG CONNECTION INDICATION The icon will appear in the upper right corner of the display and the buzzer will sound whenever the positive test lead is inserted into the 20A or uA mA input jack and a non current function is selected If this oc...

Page 23: ...RES Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts 3 HANDLE THE METER GENTLY AND CAREFULLY Dropping it can damage the electronic parts or the case 4 KEEP THE METER CLEAN Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents 5 USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE Remove old or weak ...

Page 24: ... of the LCD display The battery should be replaced 2 Follow instructions for installing batteries See the Battery Installation section of this manual 3 Dispose of the old batteries properly WARNING To avoid electric shock do not operate your meter until the battery cover is in place and fastened securely NOTE If your meter does not work properly check the fuses and batteries to make sure that they...

Page 25: ...ear cover 7 Lift the center circuit board straight up from the connectors to gain access to the fuse holders 8 Gently remove the old fuse and install the new fuse into the holder 9 Always use a fuse of the proper size and value 0 5A 250V fast blow for the 400mA range 20A 250V fast blow for the 20A range 10 Align the center board with the connectors and gently press into place 11 Replace and secure...

Page 26: ...r still doesn t operate check to be sure that both ends of the fuse are properly installed If You Do Not Understand How the Meter Works 1 Purchase Multitesters and Their Use for Electrical Testing Item No 82303 2 Call our Customer Service Line 1 888 326 1006 SERVICE AND PARTS Item Number Description 82376 Fuse kit 93894 9V battery 82378 Set of black and red Test Leads 81079 D Replacement battery c...

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